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首页> 外文期刊>International Journal of Heat and Mass Transfer >Numerical investigation of the heat transfer and fluid flow in a Carbon Monoxide boiler
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Numerical investigation of the heat transfer and fluid flow in a Carbon Monoxide boiler

机译：一氧化碳锅炉传热和流体流动的数值研究

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摘要

We present a numerical investigation of the heat transfer and fluid flow in a Carbon Monoxide (CO) boiler. The influences of some important parameters related to the geometry of a CO boiler are also discussed, including the refractory thickness and the insertion of an ellipsoidal cone. The purpose is to improve the performance of a CO boiler, especially to alleviate hot spots, which may lead to deterioration of the refractory. It is found that the skin friction coefficient arises earlier in the DeNOx section when the refractory is thinner. Refractory thickening leads to a lower temperature in the DeNOx section. After leaving the DeNOx section, the temperature reduces due to the cooling pipes and the skin friction coefficient arises abruptly near the cooling pipes. It is also found that insertion of an ellipsoidal cone can lower the temperature in the DeNOx section and there is a larger skin friction coefficient with a larger ellipsoidal cone angle. After leaving the DeNOx section, the skin friction coefficient and the temperature both decrease. Finally, based on the result of this research and from a practical point of view, refractory thickening is a preferable choice for reducing friction, pressure drop and temperature in a CO boiler.
机译：我们对一氧化碳（CO）锅炉中的传热和流体流动进行了数值研究。还讨论了与CO锅炉的几何形状有关的一些重要参数的影响，包括耐火厚度和椭圆锥的插入。目的是改善CO锅炉的性能，特别是减轻可能导致耐火材料变质的热点。发现当耐火材料变薄时，在DeNOx部分中皮肤摩擦系数出现得较早。难熔增稠导致DeNOx区域的温度降低。离开DeNOx部分后，由于冷却管温度降低，并且在冷却管附近突然出现皮肤摩擦系数。还发现插入椭圆锥可以降低DeNOx截面的温度，并且具有较大的皮肤摩擦系数和较大的椭圆锥角。离开DeNOx部分后，皮肤摩擦系数和温度均降低。最后，基于这项研究的结果并从实践的角度来看，难熔增稠是减少CO锅炉中的摩擦，压降和温度的首选。

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